Didion, Joan ( born Dec. 5, 1934 , Sacramento, Calif., U.S.American novelist and essayist known for her lucid prose style and incisive depictions of social unrest and psychological fragmentation.

Didion graduated from the University of California, Berkeley, in 1956 and then worked for Vogue magazine from 1956 to 1963, first as a copywriter and later as an editor. During this period she wrote her first novel, Run River (1963), which examines the disintegration of a California family. While in New York City, she met and married writer John Gregory Dunne, with whom she returned to California in 1964. A collection of magazine columns published as Slouching Towards Bethlehem (1968) established Didion’s reputation as an essayist and confirmed her preoccupation with the forces of disorder. In a second collection, The White Album (1979), Didion continued her analysis of the turbulent 1960s. The inner decay of the Establishment is a major theme of the essays constituting the volume After Henry (1992; also published as Sentimental Journeys).

Other works by Didion include the short novels Play It as It Lays (1970), A Book of Common Prayer (1977), Democracy (1984), and The Last Thing He Wanted (1996) and the essays Salvador (1983)and , Miami (1987), and Where I Was From (2003). Essays on U.S. politics, including the presidential election of 2000, were collected in Political Fictions (2001). Didion also wrote several screenplays with her husband, including A Star Is Born (1976; with others), True Confessions (1981), and Up Close and Personal (1996). Following Dunne’s death in 2003, she wrote The Year of Magical Thinking (2005), in which she recounted their marriage and mourned his loss. The memoir won a National Book Award, and Didion adapted it for the stage in 2007.